SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edea7285a198a7c709993d836a33f066c2e10831d70c1390016f74db5bfb84c5' 
  AND token = 'jEyqsg6HigdNta9BY/aCqiBYS/gz0X4x9pPfS3PGW9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables